GR86 4 gear SYNCHRONIZER ring in GT86? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ruben_86_ · 03-09-2023, 02:38 PM

I have to open the gearbox for a problem with the 4 gear.

I have read there that the 4 Gear of the GR86 is improved, looking for the references I have found that they are different, while in the rest of the gears they are the same.

gt86 4 gear SYNCHRONIZER SU003-05823
gr86 4 gear SYNCHRONIZER SU003-10754

Does anyone know if the new Synchronizer is compatible with the old GT86 gearbox?

Does anyone know what has improved?

Ruben_86_ · 03-27-2023, 06:06 PM

I couldn't take it and bought a synchronizer to see how it was��

He carries a layer of some rough material to improve friction, he will surely do his job better, but for how long?

RedReplicant · 03-27-2023, 09:19 PM

cabron fibre

Looks similar to the Synchrotech that was in my old box. Price looks good on the OEM piece, I'd imagine it'd work in the older boxes. Thank you for buying one and showing us for science.

https://sync-trans.com/products/syn-...carbon-synchro

Jianlun · 04-08-2023, 03:19 AM

I chanced upon this thread and wanted to share my comparison of the various gearboxes. In case anyone want to swap things around. Green highlights what changed for the new gen (marketing material say stronger gears to take the higher torque). Probably useful for you guys who FI the previous gen.

This research came about cos i wanted to be sure the synchro-tech carbon synchros fit my gr86 and the conclusion is they should cos the part numbers are the same between generations.

Ruben_86_ · 04-08-2023, 07:17 PM

Next week I will have the synchro of the 4 of the GT86 to be able to compare with that of the GR86

Ruben_86_ · 04-11-2023, 05:58 PM

Definitely something has changed in the 4 Gear, the synchro has some differences in its shape and I don't think it's a good idea to use it in an old model.

03-09-2023, 02:38 PM	#1
Ruben_86_ Member Join Date: Sep 2022 Drives: Toyota GT86 Location: spain Posts: 55 Thanks: 31 Thanked 53 Times in 24 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	GR86 4 gear SYNCHRONIZER ring in GT86? I have to open the gearbox for a problem with the 4 gear. I have read there that the 4 Gear of the GR86 is improved, looking for the references I have found that they are different, while in the rest of the gears they are the same. gt86 4 gear SYNCHRONIZER SU003-05823 gr86 4 gear SYNCHRONIZER SU003-10754 Does anyone know if the new Synchronizer is compatible with the old GT86 gearbox? Does anyone know what has improved?

03-27-2023, 09:19 PM	#3
RedReplicant Senior Member Join Date: Aug 2015 Drives: None Location: Arizona Posts: 908 Thanks: 1,460 Thanked 1,214 Times in 517 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	cabron fibre Looks similar to the Synchrotech that was in my old box. Price looks good on the OEM piece, I'd imagine it'd work in the older boxes. Thank you for buying one and showing us for science. https://sync-trans.com/products/syn-...carbon-synchro __________________ 2015 Subaru BRZ - TT5 K24 Swap

04-08-2023, 03:19 AM	#4
Jianlun Senior Member Join Date: Sep 2018 Drives: GR86 RC Location: Singapore Posts: 203 Thanks: 83 Thanked 179 Times in 92 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I chanced upon this thread and wanted to share my comparison of the various gearboxes. In case anyone want to swap things around. Green highlights what changed for the new gen (marketing material say stronger gears to take the higher torque). Probably useful for you guys who FI the previous gen. This research came about cos i wanted to be sure the synchro-tech carbon synchros fit my gr86 and the conclusion is they should cos the part numbers are the same between generations. Attached Images

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03-27-2023, 06:06 PM	#2
Ruben_86_ Member Join Date: Sep 2022 Drives: Toyota GT86 Location: spain Posts: 55 Thanks: 31 Thanked 53 Times in 24 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I couldn't take it and bought a synchronizer to see how it was�� He carries a layer of some rough material to improve friction, he will surely do his job better, but for how long?

04-08-2023, 07:17 PM	#5
Ruben_86_ Member Join Date: Sep 2022 Drives: Toyota GT86 Location: spain Posts: 55 Thanks: 31 Thanked 53 Times in 24 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Next week I will have the synchro of the 4 of the GT86 to be able to compare with that of the GR86

04-11-2023, 05:58 PM	#6
Ruben_86_ Member Join Date: Sep 2022 Drives: Toyota GT86 Location: spain Posts: 55 Thanks: 31 Thanked 53 Times in 24 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Definitely something has changed in the 4 Gear, the synchro has some differences in its shape and I don't think it's a good idea to use it in an old model.

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